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Homework Help: Ap physics at my highschool gave me a hard question

  1. Dec 2, 2007 #1
    A baseball has a mass of about 0.14 kg, and it is pitched towards home plate at a speed of about 46 m/s. If the bat exerts an average force of 8900 N for 2.1 ms, what is the final speed of the ball in m/s?
  2. jcsd
  3. Dec 5, 2007 #2

    Shooting Star

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    Do you know what is the impulse of a force? Impulse = change in momentum. Using that, this is definitely a very easy problem. Of course, we have to assume that the ball went back right the way it came.
  4. Dec 11, 2007 #3
    Impuls and change of momentum

    F *[tex]\Delta[/tex]t = m * [tex]\Delta[/tex]v

    [tex]\Delta[/tex]v is the change in velocity that you have, not the velocity by itself, but you probably know that :)
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